package com.itheima.stringbuilder;

public class Demo {
    public static void main(String[] args) {
        //1. 字符串的+操作
        String s1 = new String();

        //2. 拼接 "红色","蓝色","黄色"
        s1 = s1 + "红色";
        s1 = s1 + "蓝色";
        s1 = s1 + "黄色";

        System.out.println("s1 = " + s1);
    }
}
